. THIS MORNING- SUMMERFEST HAS ANNOUNCED ANOTHER HEADLINER. WISN 12 NEWS' MELINDA DAVENPORT HAS MORE DETAILS FROM THE BREAKING NEWS DESK. PATRICK AND MARIANNE-- USHER WILL JOIN THE LIST OF HEADLINERS AS THE 9-TH MAJOR ACT SLATED FOR THE SUMMER FESTIVAL. USHER WITH SPECIAL GUEST BEBE REXHA WILL HEADLINE THE MARCUS AMPITHEATER ON SUNDAY, JULY 6TH. OTHER PERFORMERS ALREADY ANNOUNCED ARE LADY GAGA, BRUNO MARS AND BRAD PAISLEY. SUMMER FEST IS THE WORLDS LARGEST MUSIC FESTIVAL, ATTRACTING MORE THAN 900-THOUSAND PEOPLE EACH YEAR. TICKETS FOR USHER'S SHOW-- WILL GO ON